I went to a nutritionist, and I did it in a disciplined way.
nutritionist and trainers escorted players assigned to lose or gain weight to the buffet line and sat with them.
The problem, says UC Davis physiologist and nutritionist Linda Bacon, is that very few people can lose weight and keep it off.
nutritionist nu·tri·tion·ist (nōō-trĭsh'ə-nĭst, nyōō-)
One who is trained or is an expert in the field of nutrition.